Correct option is B
Harmonium:
The harmonium is a musical instrument that has a keyboard and is widely used in Indian classical and devotional music.
The keys on the harmonium are pressed to produce notes, and air is pumped using bellows to generate sound.
Why Not the Other Options?
(a) Shehnai: A wind instrument with no keyboard; it is played by blowing air into it.
(c) Santoor: A string instrument played by striking strings with mallets, no keyboard involved.
(d) Ghatam: A percussion instrument made of clay, played by tapping with hands, no keyboard present.
